diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_i2c.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_i2c.c b/drivers/gpu/drm/radeon/atombios_i2c.c index f685035dbe3..9c570fb15b8 100644 --- a/drivers/gpu/drm/radeon/atombios_i2c.c +++ b/drivers/gpu/drm/radeon/atombios_i2c.c @@ -27,8 +27,6 @@ #include "radeon.h" #include "atom.h" -extern void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le); - #define TARGET_HW_I2C_CLOCK 50 /* these are a limitation of ProcessI2cChannelTransaction not the hw */ @@ -45,15 +43,19 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan, int index = GetIndexIntoMasterTable(COMMAND, ProcessI2cChannelTransaction); unsigned char *base; u16 out = cpu_to_le16(0); + int r = 0; memset(&args, 0, sizeof(args)); + mutex_lock(&chan->mutex); + base = (unsigned char *)rdev->mode_info.atom_context->scratch; if (flags & HW_I2C_WRITE) { if (num > ATOM_MAX_HW_I2C_WRITE) { DRM_ERROR("hw i2c: tried to write too many bytes (%d vs 3)\n", num); - return -EINVAL; + r = -EINVAL; + goto done; } if (buf == NULL) args.ucRegIndex = 0; @@ -67,7 +69,8 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan, } else { if (num > ATOM_MAX_HW_I2C_READ) { DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num); - return -EINVAL; + r = -EINVAL; + goto done; } args.ucRegIndex = 0; args.lpI2CDataOut = 0; @@ -84,13 +87,17 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan, /* error */ if (args.ucStatus != HW_ASSISTED_I2C_STATUS_SUCCESS) { DRM_DEBUG_KMS("hw_i2c error\n"); - return -EIO; + r = -EIO; + goto done; } if (!(flags & HW_I2C_WRITE)) radeon_atom_copy_swap(buf, base, num, false); - return 0; +done: + mutex_unlock(&chan->mutex); + + return r; } int radeon_atom_hw_i2c_xfer(struct i2c_adapter *i2c_adap, |